For sale my version on this compressor, works very well. Total harmonic distortion u can see (write on pics). Sowter transformers, IGS T4b, tubes - and everything what u see. Very quite, with no noise. Soft start anode voltages (something about 1min), automatic on. Oil caps - russian NOS(very good),amphenol XLR sockets, elma switch, NAIS relays, belton sockets, silver mica caps, Fuses protect plate voltages, and heaters voltages. Any question, please ask. All tubes tested as new or better, only Mullard have worse parameters(some 80%), but if someone want i change it onto other. Price 1000S.